For an extra touch of richness, use melted butter instead of vegetable oil. If you don't have apricot jam, other fruit preserves like raspberry or peach also work well. To prevent the chocolate chips from sinking into the brownies, chill them in the freezer for 15 minutes before sprinkling them on top. For cleaner cuts, chill the brownies in the refrigerator for at least 30 minutes before slicing.